TAPPI T 495 - BENDING NUMBER OF PAPERBOARDOrganization: TAPPIDate: 2003-01-01Description: This test is used to evaluate the bending quality of both coated
and uncoated paperboard from 0.4 to 1.0 mm (0.016 to 0.040 in.) in
thickness made on fourdrinier or multi-ply cylinder machines.

TAPPI T 437 - DIRT IN PAPER AND PAPERBOARDOrganization: TAPPIDate: 2008-01-01Description: An equivalent instrumental method using image analysis
for the measurement of dirt in pulp, paper, and paperboard in units
of parts per million is given in TAPPI T 563 "Equivalent Black Area
(EBA) and count of visible dirt in paper and paperboard by image
analysis." T 537 "Dirt count in paper and paperboard (optical
character recognition - OCR)" reports the number of specks of 0.02
mm2 or larger per square meter.

TAPPI UM 596 - WATER ABSORBENCY OF NONBIBULOUS PAPERBOARDOrganization: TAPPIDate: 2015-01-01Description: This method is used to determine the rate of water absorption of
an unsized or slack-sized paperboard. It is generally suitable for
sheets of paperboard 0.2 mm (0.008 in.) thick or thicker.

TAPPI T 491 - WATER IMMERSION NUMBER OF PAPERBOARDOrganization: TAPPIDate: 2008-01-01Description: This test is applicable to paperboards that are medium-sized,
with an immersion number between 4.5 and 6.0, to hard-sized, with
an immersion number of 3.5 or less, throughout.

PAPTAC - D.3 - GRAMMAGE OF PAPER AND PAPERBOARDOrganization: PAPTACDate: 2011-09-01Description: This method is for the determination of the grammage (mass per
unit area, g/m2) of paper, paperboard and converted
products that can be sampled in the form of flat sheets.

TAPPI T 412 - MOISTURE IN PULP, PAPER AND PAPERBOARD - CORRECTION 2012Organization: TAPPIDate: 2012-01-01Description: Scope and significance
The following procedure applies to pulp, paper, paperboard, and
paper products, except those containing significant quantities of
materials other than water that are volatile at lower than 107°C
(224.6°F) or degrade above 103°C (217.4°F).

TAPPI T 406 - REDUCIBLE SULFUR IN PAPER AND PAPERBOARDOrganization: TAPPIDate: 2013-01-01Description: This method describes two procedures for the determination of
reducible sulfur in paper and paperboard within the context of the
given definitions.
The quantitative procedure found in Section 9 gives a measure of
the reducible sulfur with the precision shown in Section 12.

TAPPI T 409 - MACHINE DIRECTION OF PAPER AND PAPERBOARDOrganization: TAPPIDate: 2015-01-01Description: This Standard Practice describes several procedures for
determining the machine direction of most grades of paper and
paperboard. Most of the procedures embody the principle that fibers
tend to be aligned in the machine direction of the sheet, and this
alignment produces observable effects.

TAPPI T 401 - FIBER ANALYSIS OF PAPER AND PAPERBOARDOrganization: TAPPIDate: 2015-01-01Description: This method provides a procedure for the identification of the
kinds of fibers present in a sample of paper or paperboard and
their quantitative estimation. This method requires the analyst be
skillful and experienced in the field of pulp and paper
microscopy.